PlayStation 4 dev idc released new scripts on Github that invoke the PS4 kernel to decrypt the contents of a PS4 update file (firmware) and pup unpacker scripts, now before you ask no this release is not going to get you any steps closer to a PS4 CFW but as zecoxao outlines on his twitter this can help "porting webkit exploit everywhere, for instance. you can decrypt any usermode elfs from 1.00 to 3.55/3.70 because sony forgot to change keyset",
PuP Decryptionpup_decrypt: A utility to invoke the PS4 kernel to decrypt the contents of an update file. The default (hardcoded) operation is to decrypt /mnt/usb0/PS4UPDATE.PUP. This will output a number of files (depending if a normal or a recovery update):
These decrypted updates can then be further unpacked using a tool capable of doing so.
Note The PS4 will refuse to decrypt updates in some cases: Versions older than the installed version (for the most part, there's exceptions for things like beta versions).
Versions for a different product code (retail cannot decrypt test or debug updates)
View attachment 8021
pup_unpack A utility to unpack PS4 update blobs that have been previously decrypted using pup_decrypt.
Note This utility will not unpack the contents of nested filesystems. The filesystem images in updates are FAT32, exFAT, etc images and can be mounted or unpacked with other tools.
via zecoxao's Twitter
- Q (via twitter): What could this lead to ?
- A (via zecoxao): porting webkit exploit everywhere, for instance . you can decrypt any usermode elfs from 1.00 to 3.55/3.70 because sony forgot to change keyset
- Q (via Twitter): Is the first step to actual CFW, is there a way to repack and encrypt the PUP again?
- A (via zecoxao): no and there never will be unless you own a 15 million dollar quantum computer
Source Code (via Github):
PS4 PS4 PuP Decrypt and Unpacker by idc - (Good for webkit exploits?)
By LightningMods on Jan 31, 2017 at 12:43 AM
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